Downgrading iPod Touch 3G 3.1.3 with Friends SHSH and ECID?

Discussion in 'iPod touch' started by nonslim, Feb 22, 2010.

  1. nonslim

    nonslim New Member

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    Well, When I jailbroke my friends 3.1.2 ipod touch 3G for him, I saved the SHSH, and ECID on my Computer, and sent them to my email.

    I was planning on buying an ipod touch 3G, and ofcourse, it comes with the 3.1.3 update.

    So my question is:

    IS IT POSSIBLE TO TAKE MY FRIENDS SHSH-ECID, AND USE THAT TO DOWNGRADE MY IPOD TOUCH 3G?

    I already know how to do it if I have them, like how to downgrade it, but this thought came across, and I dont want to do it if it will break mine or his ipod somehow

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  2. Jarlath

    Jarlath Retired Moderator

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    No - the ECID SHSH key is tied to your iPod's hardware-specific UDID. It's like trying to use someone else's key to try to unlock the door to your home - it's not likely to work because each lock is (theoretically) unique, or at least that combination is set up to be extremely unlikely to be duplicated by your friend's lock. You're thinking of the ECID SHSH key all wrong - it's a key, not a generic piece of software like a firmware update.
  3. nonslim

    nonslim New Member

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    :O lol now I get it, thanks.
  4. ramik911

    ramik911 New Member

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    Is there a way to get the SHSH and ECID from a 3.1.3 iPod Touch 3G. Maybe when it sends it over to Apples server at the end of the restore process???

    Thanx.
  5. Aodhan97

    Aodhan97 Banned

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    i dont think so
  6. Jarlath

    Jarlath Retired Moderator

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    The issue is that the key you need for the 3.1.2 FW is different from the 3.1.3 FW ECID SHSH, since the key depends in part on the firmware and part on the iPod's UDID which is its hardware serial number. So you could theoretically get the ECID SHSH key from 3.1.3 for that iPod Touch 3G, but it'd only be good for reinstalling firmware 3.1.3 on that particular iPod. Again look at that key analogy; if you change the lock on the door, the old key isn't going to work anymore even if the door is still the same.
  7. Mr.Funman

    Mr.Funman Banned

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    I want to know too :3

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